package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.util.Internal;
import org.apache.poi.util.StringUtil;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * @author jingchun
 * @create 2024-05-01 10:46
 */
@Service
public class ReportServiceImpl implements ReportService {

	@Autowired
	private OrderMapper orderMapper;
	@Autowired
	private UserMapper userMapper;
	@Autowired
	private WorkspaceService workspaceService;

	/**
	 * 营业额统计
	 * @param begin
	 * @param end
	 * @return
	 */
	public TurnoverReportVO getTurnOver(LocalDate begin, LocalDate end) {
		// 当前集合勇于存放从begin到end范围内每天的日期
		List<LocalDate> dateList = new ArrayList<>();

		while (begin.isBefore(end)) {
			dateList.add(begin);
			// 计算指定日期的后一天日期
			begin = begin.plusDays(1);
		}
		dateList.add(end);

		// while (!begin.equals(end)){
		// 	begin = begin.plusDays(1);//日期计算，获得指定日期后1天的日期
		// 	dateList.add(begin);
		// }


		// 获取每天的营业
		List<Double> turnoverList = new ArrayList<>();
		// select sum(amount) from orders where order_time > beginTime and order_time < endTime and status = 5
		for(LocalDate localDate : dateList){
			// 查询当前date日期对应的营业额，营业额是指：订单状态为5的订单总金额
			// select sum(amount) from orders where order_time > beginTime and order_time < endTime and status = 5
			LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
			LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
			Map map = new HashMap<>();
			map.put("begin",beginTime);
			map.put("end",endTime);
			map.put("status",5);
			Double turnover = orderMapper.sumByMap(map);
			turnover = turnover == null ? 0.0 : turnover;
			turnoverList.add(turnover);
		}

			return TurnoverReportVO.builder().dateList(StringUtils.join(dateList,",")).turnoverList(StringUtils.join(turnoverList,",")).build();
	}

	/**
	 * 用户统计
	 * @param begin
	 * @param end
	 * @return
	 */
	public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
		List<LocalDate> dateList = new ArrayList<>();
		dateList.add(begin);
		while (!begin.equals(end)){
			begin = begin.plusDays(1);
			dateList.add(begin);
		}
		List<Integer> newUserList = new ArrayList<>(); //新增用户数
		List<Integer> totalUserList = new ArrayList<>(); //总用户数
		for (LocalDate date : dateList) {
			LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
			LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

			Map map = new HashMap();
			map.put("end",endTime);

			//查询总用户数
			Integer totalUser = userMapper.countByMap(map);
			map.put("begin",beginTime);
			//新增用户数
			Integer newUser =userMapper.countByMap(map);

			newUserList.add(newUser);
			totalUserList.add(totalUser);
		}
    return UserReportVO.builder()
		    .dateList(StringUtils.join(dateList,","))
		    .newUserList(StringUtils.join(newUserList,","))
		    .totalUserList(StringUtils.join(totalUserList,","))
		    .build();
	}

	public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
		// 获取list日期集合
		List<LocalDate> dateList = new ArrayList<>();
		dateList.add(begin);
		while (!begin.equals(end)){
			begin = begin.plusDays(1);
			dateList.add(begin);
		}
		// 每天订单总数集合
		ArrayList<Integer> orderCountList = new ArrayList<>();
		// 每天有效订单数集合
		ArrayList<Integer> validCountList = new ArrayList<>();
		// 遍历dateList集合，获取每天的订单总数和有效订单数
		for (LocalDate date : dateList){
			LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
			LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
		// 	查询每天的订单总数 select count(id) from orders where order_time > beginTime and order_time < endTime
			Integer orderCount = getOrderCount(beginTime, endTime, null);
		// 	查询每天的订单有效数 select count(id) from orders where order_time > beginTime and order_time < endTime and status = 5
			Integer validCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);

			orderCountList.add(orderCount);
			validCountList.add(validCount);
		}
		// 查询区间内的订单总数
		Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
		// 时间区间内的有效订单数
		Integer validOrderCount = validCountList.stream().reduce(Integer::sum).get();

		// 订单完成率
		Double orderCompletionRate = 0.00;
		if (totalOrderCount != 0){
			orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
		}


		return OrderReportVO.builder()
				.dateList(StringUtils.join(dateList,","))
				.orderCountList(StringUtils.join(orderCountList,","))
				.validOrderCountList(StringUtils.join(validCountList,","))
				.totalOrderCount(totalOrderCount)
				.validOrderCount(validOrderCount)
				.orderCompletionRate(orderCompletionRate)
				.build();
	}
	/**
	 * 查询指定时间区间内的销量排名top10
	 * @param begin
	 * @param end
	 * @return
	 */
	public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
		LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
		LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
		List<GoodsSalesDTO> goodsSalesDTOList = orderMapper.getSalesTop10(beginTime, endTime);
		String nameList="";
		String numberList="";
		if (goodsSalesDTOList != null && !goodsSalesDTOList.isEmpty()){
			// 获取top10商品名称
			nameList = StringUtils.join(goodsSalesDTOList.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList()),",");
			// 获取top10商品销量
			numberList = StringUtils.join(goodsSalesDTOList.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList()),",");
		}

		return SalesTop10ReportVO.builder()
				.nameList(nameList)
				.numberList(numberList)
				.build();
	}

	/**
	 * 导出近30天运营数据报表
	 * @param response
	 */
	public void exportBusinessData(HttpServletResponse response) {
		LocalDate begin = LocalDate.now().minusDays(30);
		LocalDate end = LocalDate.now().minusDays(1);
		//查询概览运营数据，提供给Excel模板文件
		BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(begin,LocalTime.MIN), LocalDateTime.of(end, LocalTime.MAX));
		InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
		try {
			//基于提供好的模板文件创建一个新的Excel表格对象
			XSSFWorkbook excel = new XSSFWorkbook(inputStream);
			//获得Excel文件中的一个Sheet页
			XSSFSheet sheet = excel.getSheet("Sheet1");
			sheet.getRow(1).getCell(1).setCellValue(begin + "至" + end);
			//获得第4行
			XSSFRow row = sheet.getRow(3);
			// 获取单元格
			row.getCell(2).setCellValue(businessData.getTurnover());
			row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
			row.getCell(6).setCellValue(businessData.getNewUsers());
			row = sheet.getRow(4);
			row.getCell(2).setCellValue(businessData.getValidOrderCount());
			row.getCell(4).setCellValue(businessData.getUnitPrice());
			for (int i = 0; i < 30; i++) {
				LocalDate date = begin.plusDays(i);
			//准备明细数据
			businessData = workspaceService.getBusinessData(LocalDateTime.of(date,LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));
			row = sheet.getRow(7 + i);
			row.getCell(1).setCellValue(date.toString());
			row.getCell(2).setCellValue(businessData.getTurnover());
			row.getCell(3).setCellValue(businessData.getValidOrderCount());
			row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
			row.getCell(5).setCellValue(businessData.getUnitPrice());
			row.getCell(6).setCellValue(businessData.getNewUsers());
		}
		//通过输出流将文件下载到客户端浏览器中
		ServletOutputStream out = response.getOutputStream();
		excel.write(out);
		//关闭资源
		out.flush();
		out.close();
		excel.close();
	} catch (IOException e) {
		e.printStackTrace();
	}

	}

	/**
	 * 根据时间区间统计指定状态的订单数量
	 * @param begin
	 * @param end
	 * @param status
	 * @return
	 */
	private Integer getOrderCount(LocalDateTime begin, LocalDateTime end,Integer status){
		Map map = new HashMap();
		map.put("status",status);
		map.put("begin",begin);
		map.put("end",end);
		return orderMapper.countByMap(map);
	}

}
